hook it back up so you can see your computer.
Right click on the desktop, click on properties (xp) or personalize (vista)
go to settings (xp) or display settings (vista)
you may see two boxes, one should be black the other should be greyed out, click the one that is greyed out, this represents the unused port on your videocard
down below select where it says extend my desktop onto this monitor, and click apply
after a few seconds things should be back to normal (if a window asks you to save settings press yes)
you should be able to switch cables and get the display on your tv, just the background though
to make it display the whole desktop you need to switch the cables back
go back to settings if you closed it
click on the secondary monitor box
and click where it says this is my main monitor
this may be tricky as the screen will go black
you have about 20 seconds to change the cable and press save settings (or you can press enter before changing cables)
and presto, you should have fixed your problem
